ci: use common definition of C++ versions

.github/actions/ci/action.yml

@@ -5,17 +5,19 @@ inputs:
     description: 'Version of Lua to use for building and testing.'
     required: false
     default: '5.3'
-  cpp-sdk-version:
-    description: 'Version of the C++ Server-side SDK to use for building and testing.'
+  cpp-sdk-redis-version:
+    description: 'Version of the C++ Server-side SDK with Redis Source to use for building and testing.'
     required: false
-    default: 'launchdarkly-cpp-server-redis-source-v2.1.3'
   rockspec:
     description: 'The rockspec file for the server-side SDK.'
     required: true
 
 runs:
   using: composite
   steps:
+    - name: Get C++ Versions
+      id: cpp-versions
+      uses: ./.github/actions/cpp-versions
     - name: Install Lua
       uses: leafo/gh-actions-lua@35bcb06abec04ec87df82e08caa84d545348536e
       with:
@@ -31,7 +33,7 @@ runs:
     - name: Install CPP SDK
       uses: ./.github/actions/install-cpp-sdk-redis
       with:
-          version: ${{ inputs.cpp-sdk-version }}
+          version: ${{ inputs.cpp-sdk-redis-version }}
           path: cpp-sdk
 
     - name: Build Package

.github/actions/cpp-versions/action.yml

@@ -0,0 +1,24 @@
+# The following chunk of yml pulls two C++ sdk version numbers out of a file and
+# makes them available to the other actions/workflows in a convenient fashion.
+# This allows us to easily bump the version numbers in one place, instead of multiple yml files.
+name: C++ Versions
+description: Foo
+outputs:
+  sdk:
+    description: 'The version of the C++ Server-side SDK.'
+    value: ${{ steps.cpp-versions.outputs.sdk }}
+  redis_source:
+    description: 'The version of the C++ Server-side SDK with Redis Source.'
+    value: ${{ steps.cpp-versions.outputs.redis_source }}
+runs:
+  using: composite
+  steps:
+      - name: Set C++ Versions
+        id: cpp-versions
+        shell: bash
+        run:  cat ./.github/variables/cpp-sdk-versions.env > $GITHUB_OUTPUT
+      - name: Display C++ Versions
+        shell: bash
+        run: |
+          echo "${{ format('C++ Server SDK v{0}', steps.cpp-versions.outputs.sdk) }}"
+          echo "${{ format('C++ Server SDK Redis Source v{0}', steps.cpp-versions.outputs.redis_source) }}"

.github/actions/install-cpp-sdk-redis/action.yml

@@ -4,21 +4,23 @@ inputs:
     version:
         required: true
         description: "Version of the C++ SDK with Redis Source."
-        default: "launchdarkly-cpp-server-redis-source-v2.1.3"
     path:
       description: "Where to download the SDK."
       default: "cpp-sdk"
 
 runs:
   using: composite
   steps:
+    - name: Get Default C++ Versions
+      id: cpp-versions
+      uses: ./.github/actions/cpp-versions
     - name: Download C++ Server-side SDK with Redis Source
       uses: robinraju/release-downloader@efa4cd07bd0195e6cc65e9e30c251b49ce4d3e51
       id: download-cpp-sdk
       with:
           repository: "launchdarkly/cpp-sdks"
           latest: false
-          tag: ${{ inputs.version }}
+          tag: ${{ format('launchdarkly-cpp-server-redis-source-v{0}', inputs.version || steps.cpp-versions.outputs.redis_source) }}
           fileName: linux-gcc-x64-dynamic.zip
           out-file-path: ${{ inputs.path }}
           extract: true

.github/variables/cpp-sdk-versions.env

@@ -0,0 +1,2 @@
+sdk=3.3.3
+redis_source=2.1.3

.github/workflows/ci.yml

@@ -52,9 +52,14 @@ jobs:
       LD_SDK_KEY: foo
     steps:
       - uses: actions/checkout@v4
+      - name: Get C++ Versions
+        id: cpp-versions
+        uses: ./.github/actions/cpp-versions
       - name: Build ${{ matrix.name }} image
         run: |
-          docker build -t launchdarkly:${{ matrix.name }} -f ./examples/${{ matrix.name }}/Dockerfile .
+          docker build \
+          --build-arg="CPP_SDK_VERSION=${{ steps.cpp-versions.outputs.sdk }}" \
+          -t launchdarkly:${{ matrix.name }} -f ./examples/${{ matrix.name }}/Dockerfile .
       - name: Run ${{ matrix.name }} container in background
         run: |
           docker run -dit --rm --name ${{ matrix.name }} -p 8123:80 --env LD_SDK_KEY="$LD_SDK_KEY" launchdarkly:${{ matrix.name }}
@@ -76,9 +81,14 @@ jobs:
       LD_SDK_KEY: foo
     steps:
       - uses: actions/checkout@v4
+      - name: Get C++ Versions
+        id: cpp-versions
+        uses: ./.github/actions/cpp-versions
       - name: Build ${{ matrix.name }} image
         run: |
-          docker build -t launchdarkly:${{ matrix.name }} -f ./examples/${{ matrix.name }}/Dockerfile .
+          docker build \
+          --build-arg="CPP_SDK_VERSION=${{ steps.cpp-versions.outputs.sdk }}" \
+          -t launchdarkly:${{ matrix.name }} -f ./examples/${{ matrix.name }}/Dockerfile .
       - name: Run ${{ matrix.name }} container in foreground
         run: |
           docker run --env LD_SDK_KEY="$LD_SDK_KEY" launchdarkly:${{ matrix.name }} > logs.txt

.github/workflows/install-lua-sdk.yml

@@ -29,7 +29,6 @@ on:
         description: "Version of the C++ Server-side SDK."
         required: false
         type: string
-        default: 'launchdarkly-cpp-server-redis-source-v2.1.3'
   workflow_call:
     inputs:
       package:
@@ -49,7 +48,6 @@ env:
   PACKAGE: ${{ inputs.package == null && 'launchdarkly-server-sdk' || inputs.package }}
   VERSION: ${{ inputs.version == null && '' || inputs.version }}
   LUA_VERSION: ${{ inputs.lua-version == null && '5.3' || inputs.lua-version }}
-  CPP_SDK_VERSION: ${{ inputs.cpp-sdk-version == null && 'launchdarkly-cpp-server-redis-source-v2.1.3' || inputs.cpp-sdk-version }}
 jobs:
   install:
     runs-on: ubuntu-latest
@@ -74,7 +72,7 @@ jobs:
       - name: Install CPP SDK
         uses: ./.github/actions/install-cpp-sdk-redis
         with:
-          version: ${{ env.CPP_SDK_VERSION }}
+          version: ${{ inputs.cpp-sdk-version }}
           path: cpp-sdk
 
       - name: Install Package

examples/hello-debian/Dockerfile

@@ -4,6 +4,8 @@ FROM debian:bookworm
 ARG VERSION=2.1.0
 # {{ x-release-please-end }}
 
+ARG CPP_SDK_VERSION=3.3.3
+
 # For unknown reasons, it appears that boost.json and boost.url aren't included in the
 # libboost-all package.
 
@@ -16,7 +18,7 @@ RUN apt-get update && apt-get install -y \
 
 
 RUN mkdir cpp-sdk-libs
-RUN git clone --branch launchdarkly-cpp-server-v3.3.3 https://github.com/launchdarkly/cpp-sdks.git && \
+RUN git clone --branch launchdarkly-cpp-server-v${CPP_SDK_VERSION} https://github.com/launchdarkly/cpp-sdks.git && \
     cd cpp-sdks && \
     mkdir build-dynamic && \
     cd build-dynamic && \

examples/hello-haproxy/Dockerfile

@@ -4,6 +4,8 @@ FROM ubuntu:22.04
 ARG VERSION=2.1.0
 # {{ x-release-please-end }}
 
+ARG CPP_SDK_VERSION=3.3.3
+
 RUN apt-get update && apt-get install -y \
     curl luarocks lua5.3 lua5.3-dev \
     haproxy apt-transport-https ca-certificates \
@@ -13,7 +15,7 @@ RUN add-apt-repository ppa:mhier/libboost-latest && \
      apt-get update && \
      apt-get install -y boost1.81
 
-RUN curl https://github.com/launchdarkly/cpp-sdks/releases/download/launchdarkly-cpp-server-v3.3.3/linux-gcc-x64-dynamic.zip -L -o /tmp/sdk.zip && \
+RUN curl https://github.com/launchdarkly/cpp-sdks/releases/download/launchdarkly-cpp-server-v${CPP_SDK_VERSION}/linux-gcc-x64-dynamic.zip -L -o /tmp/sdk.zip && \
     mkdir ./cpp-sdk && \
     unzip /tmp/sdk.zip -d ./cpp-sdk && \
     rm /tmp/sdk.zip

examples/hello-nginx/Dockerfile

@@ -4,6 +4,8 @@ FROM openresty/openresty:jammy
 ARG VERSION=2.1.0
 # {{ x-release-please-end }}
 
+ARG CPP_SDK_VERSION=3.3.3
+
 RUN apt-get update && apt-get install -y \
     git netbase curl libssl-dev apt-transport-https ca-certificates \
     software-properties-common \
@@ -15,7 +17,7 @@ RUN add-apt-repository ppa:mhier/libboost-latest && \
 
 
 RUN mkdir cpp-sdk-libs
-RUN git clone --branch launchdarkly-cpp-server-v3.3.3 https://github.com/launchdarkly/cpp-sdks.git && \
+RUN git clone --branch launchdarkly-cpp-server-v${CPP_SDK_VERSION} https://github.com/launchdarkly/cpp-sdks.git && \
     cd cpp-sdks && \
     mkdir build-dynamic && \
     cd build-dynamic && \